Beutler, G., Drewes, H., Reigber, Ch., Rummel, R., 2003. Proposal to Establish the Integrated Global Geodetic Observing System (IGGOS), 30 January, http://www.gfy.ku.dk/∼iag/newstructure/iggos_prop_feb_28_2003.pdf.
Cox, 2002, Detection of a large-scale mass redistribution in the terrestrial system since 1998, Science, 297, 831, 10.1126/science.1072188
IGS, 2001. International GPS Service, Strategic Plan, 2002–2007. IGS Central Bureau, JPL, Pasadena.
IGS, 2003. International GPS Service, Information and Resources, http://igscb.jpl.nasa.gov.
2000
Schuh, H., et al., February 2002. Final Report of the IVS Working Group 2 for Product Specification and Observing Programs. IVS Annual Report 2001. Greenbelt, http://ivscc.gsfc.nasa.gov.
Willis, P., Bar-Sever, Y., Tavernier, G. DORIS as a Potential Part of the Global Geodetic Observing System. J. Geodyn 40 (4–5), 494–501.